The definition of 'align-regexp doesn't check that the group optional argument is non-nil before calling 'abs on it. In GNU Emacs 23.1.90.1 (x86_64-apple-darwin10.4.0, NS apple-appkit-1038.32) of 2010-07-17 on ridley.local Windowing system distributor `Apple', version 10.3.1038 configured using `configure '--with-ns'' Important settings: value of $LC_ALL: nil value of $LC_COLLATE: nil value of $LC_CTYPE: nil value of $LC_MESSAGES: nil value of $LC_MONETARY: nil value of $LC_NUMERIC: nil value of $LC_TIME: nil value of $LANG: nil value of $XMODIFIERS: nil locale-coding-system: nil default enable-multibyte-characters: t Major mode: ERC Minor modes in effect: erc-track-mode: t erc-track-minor-mode: t erc-services-mode: t erc-ring-mode: t erc-networks-mode: t erc-netsplit-mode: t erc-menu-mode: t erc-match-mode: t erc-log-mode: t erc-list-mode: t erc-pcomplete-mode: t erc-button-mode: t erc-fill-mode: t erc-stamp-mode: t erc-autojoin-mode: t erc-irccontrols-mode: t erc-noncommands-mode: t erc-move-to-prompt-mode: t erc-readonly-mode: t shell-dirtrack-mode: t auto-image-file-mode: t tooltip-mode: t mouse-wheel-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t global-auto-composition-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t size-indication-mode: t column-number-mode: t line-number-mode: t transient-mark-mode: t Recent input: b r i n g i n g C-p C-l M-> C-l j l f W e l l , SPC a t SPC l e a s t SPC C-a C-e C-a C-k j l f I SPC t h i n k SPC y o u ' r e SPC r i g h t . M-b M-b C-w C-w C-h f a l i g n - r e C-e M-b C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-s g r o u p C-s C-n C-s-f C-s-f C-s-f M-f M-f M-b C-e M-b e x a c t l y SPC C-e / e m m e SPC l e a p s SPC o n t o SPC h i s SPC c h a i r . SPC " A S-SPC B U G ! S-SPC K I L L S-SPC I T ! C-a M-f M-f M-b s c r e a m s , SPC C-e " C-s-f C-s-f C-s-f C-s-f C-s-f M C-a C-k C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-l M-> C-l M ' k a y C-a C-k C-s-b C-s-b C-s-b C-s-n C-s-f C-s-f C-s-f M-v M-v C-r t h u n k C-r C-r C-r C-r C-l C-v C-s t h u n k C-s C-s M-> W i l l SPC d o . / n i c k SPC t h u n k | a w a y / n i c k SPC t h u n k M-v C-x RET r e p o Recent messages: Mark set Invalid face reference: t [221 times] Type "q" to restore this window. Invalid face reference: t [13 times] uncompressing align.el.gz...done Invalid face reference: t [14 times] Mark saved where search started Mark set Mark saved where search started [2 times] Mark set Load-path shadows: /Users/luke/.emacs.d/elisp/gnus hides /Applications/Emacs.app/Contents/Resources/lisp/gnus/gnus Features: (shadow sort mail-extr emacsbug debug mule-util w3m-form w3m-bookmark w3m-tabmenu w3m-session ffap w3m doc-view dired image-mode timezone w3m-hist w3m-fb w3m-ems w3m-ccl ccl w3m-favicon w3m-image w3m-proc w3m-util tabify jka-compr newcomment find-func goto-addr align hippie-exp info help-mode view uniquify multi-isearch rainbow-mode ibuf-ext ibuffer animate eldoc slime-banner slime-asdf slime-fancy slime-fontifying-fu slime-package-fu slime-references slime-scratch slime-presentations slime-fuzzy slime-fancy-inspector slime-c-p-c slime-editing-commands slime-repl slime-autodoc slime-parse byte-opt slime bytecomp byte-compile apropos easy-mmode hideshow hyperspec browse-url clojure-mode js2-mode imenu js2-indent js2-parse js2-browse js2-highlight js2-ast js2-messages js2-scan js2-util js2-vars cc-langs cc-mode cc-fonts cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs js2-externs paredit vc-git tramp-imap epa derived epg epg-config imap-hash imap message sendmail ecomplete rfc822 mml mml-sec mm-decode mm-bodies mm-encode mailcap mail-parse rfc2231 rfc2047 rfc2045 qp ietf-drums mailabbrev nnheader mm-util mail-prsvr gmm-utils mailheader canlock sha1 hex-util hashcash mail-utils assoc tramp-gw tramp-fish tramp-smb tramp-cache tramp-ftp tramp-cmds tramp auth-source gnus-util netrc advice help-fns advice-preload password-cache tramp-compat trampver erc-track erc-services erc-ring erc-networks erc-netsplit erc-menu erc-match erc-log erc-pcomplete time-date pcomplete erc-button erc-fill erc-stamp erc-join edmacro kmacro w3m-load color-theme-charred color-theme wid-edit slime-autoloads diary-lib diary-loaddefs cal-menu calendar cal-loaddefs midnight erc-goodies erc erc-backend erc-compat format-spec thingatpt pp tls ido acctdb ansi-color shell comint ring yow cookie1 regexp-opt image-file cl cl-19 tooltip ediff-hook vc-hooks lisp-float-type mwheel ns-win easymenu tool-bar dnd fontset image fringe lisp-mode register page menu-bar rfn-eshadow timer select scroll-bar mldrag mouse jit-lock font-lock syntax facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev loaddefs button minibuffer faces cus-face text-properties overlay md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote make-network-process ns multi-tty emacs)